CVE-2026-15713

NameCVE-2026-15713
DescriptionA vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated attacker acting as a malicious network peer can trick the connection engine into allocating stream states that are subsequently leaked during cleanup. Over a sustained period, this flaw allows the remote attacker to consume the system's heap allocations incrementally, triggering a denial of service (DoS) through an ultimate Out-of-Memory (OOM) application crash.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1142842

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libsoup2.4 (PTS)bullseye2.72.0-2vulnerable
bullseye (security)2.72.0-2+deb11u3vulnerable
bookworm2.74.3-1+deb12u1vulnerable
trixie2.74.3-10.1vulnerable
libsoup3 (PTS)bookworm3.2.3-0+deb12u2vulnerable
trixie3.6.5-3vulnerable
forky, sid3.6.6-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libsoup2.4source(unstable)(unfixed)
libsoup3source(unstable)(unfixed)1142842

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2499941
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/541

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